Eric Duvall, cartographic technician, left, and Jeff Olsen, geodesist, both with the National Oceanic and Atmospheric Administration (NOAA) National Geodetic Survey, measures elevation in March on the National Mall, with the Washington Monument in the background. Government surveyors, in a report issued Tuesday have found the Washington Monument did not sink further into the ground as a result of last year’s 5.8-magnitude earthquake.